极客观点
研发管理
HarmonyOS
打印出来的log
04-18 14:59:09.566 14795-16215/com.yg.ggcar E/json_parts: Ford_Mustang_yuanche_hougai_fu.png
04-18 14:59:09.616 14795-16215/com.yg.ggcar I/System.out: Thread-1397 calls detatch()
04-18 14:59:09.616 14795-16215/com.yg.ggcar I/成功写入本地: /storage/emulated/0/ggcar/car/Mustang/Ford_Mustang_yuanche_hougai_fu.json
04-18 14:59:09.706 14795-16215/com.yg.ggcar I/System.out: Thread-1397 calls detatch()
04-18 14:59:09.716 14795-16215/com.yg.ggcar W/System.err: java.io.FileNotFoundException: /storage/emulated/0/ggcar/car/Mustang: open failed: EISDIR (Is a directory)
04-18 14:59:09.716 14795-16215/com.yg.ggcar W/System.err: at libcore.io.IoBridge.open(IoBridge.java:409)
04-18 14:59:09.716 14795-16215/com.yg.ggcar W/System.err: at java.io.FileOutputStream.<init>(FileOutputStream.java:88)
04-18 14:59:09.716 14795-16215/com.yg.ggcar W/System.err: at java.io.FileOutputStream.<init>(FileOutputStream.java:73)
04-18 14:59:09.716 14795-16215/com.yg.ggcar W/System.err: at com.zhy.utils.Read_Write.write(Read_Write.java:33)
04-18 14:59:09.716 14795-16215/com.yg.ggcar W/System.err: at com.yg.activity.Choose_Car$4.run(Choose_Car.java:512)
04-18 14:59:09.716 14795-16215/com.yg.ggcar W/System.err: at java.lang.Thread.run(Thread.java:841)
04-18 14:59:09.716 14795-16215/com.yg.ggcar W/System.err: Caused by: libcore.io.ErrnoException: open failed: EISDIR (Is a directory)
04-18 14:59:09.716 14795-16215/com.yg.ggcar W/System.err: at libcore.io.Posix.open(Native Method)
04-18 14:59:09.716 14795-16215/com.yg.ggcar W/System.err: at libcore.io.BlockGuardOs.open(BlockGuardOs.java:110)
04-18 14:59:09.716 14795-16215/com.yg.ggcar W/System.err: at libcore.io.IoBridge.open(IoBridge.java:393)
04-18 14:59:09.716 14795-16215/com.yg.ggcar W/System.err: ... 5 more
04-18 14:59:09.716 14795-16215/com.yg.ggcar I/Read_Write_write: 创建文件失败！这个是主界面调用Read_Write方法的地方
Read_Write.write(ServerAPI.Location_Path_Car + carname + "/", json_parts.get(i).getoptions()[opt].getJSONFile(), result1 + "");Read_Write.class
public class Read_Write {
public static void write(String dir, String filename, String content) {
try {
// 如果手机插入SD卡，而且应用程序具有访问SD的权限
if (Environment.getExternalStorageState().equals(
Environment.MEDIA_MOUNTED)) {
// 获取SD卡目录
// File sdCardDir = Environment.getExternalStorageDirectory();
// File targetFile = new File(sdCardDir.getCanonicalPath() +
// "/GGCar/"+ filename);
File targetdir = new File(dir);
if (!targetdir.exists()) {
targetdir.mkdir();
Log.i("mkdir", "成功创建：" + targetdir);
}
File targetFile = new File(dir + filename);
FileOutputStream fos = new FileOutputStream(targetFile);
if (content!=null){
fos.write(content.getBytes());
fos.close();
}
// 以指定文件创建RandomAccessFile对象
// RandomAccessFile raf = new RandomAccessFile(targetFile, "rw");
// Log.e("targetFile", String.valueOf(targetFile));
// // 将文件记录指针移动到最后
// raf.seek(targetFile.length());
// // 写入文件内容
// raf.write(content.getBytes());
// Log.e("content", content);
// // 关闭
// raf.close();
// Toast.makeText(SecondMainActivity.this, "数据已保存到" +
// targetFile,Toast.LENGTH_LONG).show();
// System.out.println("targetFile = " + targetFile);
Log.i("成功写入本地", targetFile + "");
}
} catch (Exception e) {
e.printStackTrace();
Log.i("Read_Write_write", "创建文件失败！");
}
}
// 讀取文件
public static String read(String FILE_NAME) {
try {
// 如果手機插入了SD卡，而且應用程序具有访问SD的权限
if (Environment.getExternalStorageState().equals(
Environment.MEDIA_MOUNTED)) {
// 获取SD卡对应的存储目录
// File sdCardDir = Environment.getExternalStorageDirectory();
// 获取指定文件对应的输入流
// FileInputStream fis = new
// FileInputStream(sdCardDir.getCanonicalPath() + "/GGCar/" +
// FILE_NAME);
FileInputStream fis = new FileInputStream(FILE_NAME);
// 将指定输入流包装成BufferedReader
BufferedReader br = new BufferedReader(new InputStreamReader(
fis));
StringBuilder sb = new StringBuilder("");
String line = null;
// 循环读取文件内容
while ((line = br.readLine()) != null) {
sb.append(line);
}
// 关闭资源
br.close();
return sb.toString();
}
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
public static void deletefile(String filedir) {
File file = new File(filedir);
if (file.exists()) {
file.delete();
Log.i("delete", filedir + "删除成功");
}
}
public static void deleteDirectory(File file) {
if (file.isFile()) {
file.delete();
return;
}
if (file.isDirectory()) {
File[] childFiles = file.listFiles();
if (childFiles == null || childFiles.length == 0) {
file.delete();
return;
}
for (int i = 0; i < childFiles.length; i++) {
deleteDirectory(childFiles[i]);
}
file.delete();
}
}
public static LinkedList<String> getFileName(File[] files) {
LinkedList<String> name = new LinkedList<String>();
if (files != null) {// 先判断目录是否为空，否则会报空指针
for (File file : files) {
if (file.isDirectory()) {
getFileName(file.listFiles());
Log.i("zeng", "若是文件目录。继续读2" + file.getName().toString()
+ file.getPath().toString());
} else {
String fileName = file.getName();
if (fileName.endsWith(".do")) {
HashMap map = new HashMap();
String s = fileName.substring(0,
fileName.lastIndexOf(".")).toString();
Log.i("zeng", "文件名do：" + s);
name.add(s);
}
}
}
return name;
} else {
// 创建文件夹
}
return null;
}
public static LinkedList<String> getDirectoryName(File[] files) {
LinkedList<String> name = new LinkedList<String>();
if (files != null) {// 先判断目录是否为空，否则会报空指针
for (File file : files) {
if (file.isDirectory()) {
name.add(file.getName().toString());
Log.i("zeng", "若是文件目录。继续读2" + file.getName().toString()
+ file.getPath().toString());
}
}
return name;
}
return null;
}
public static boolean fileIsExists(String FILE_NAME) {
try {
// 获取SD卡对应的存储目录
File sdCardDir = Environment.getExternalStorageDirectory();
File f = new File(sdCardDir.getCanonicalPath() + "/GGCar/"
+ FILE_NAME);
if (!f.exists()) {
return false;
}
} catch (Exception e) {
// TODO: handle exception
return false;
}
return true;
}
}
android
文件加扩展名了吗